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Usimov [2.4K]
3 years ago
6

A researcher would like to determine the effect of caffeine on memory. Participants are randomly assigned to receive a caffeine

pill or a sugar pill. Both groups complete a recall task that assesses their memory. However, even those who received the sugar pill had a small increase in memory. This is likely due to: a. The placebo effect b. The correlational approach to the study c. The participants becoming smarter d. The experimental effect
Biology
2 answers:
yKpoI14uk [10]3 years ago
6 0

Answer:

a) The placebo effect

Explanation:

The placebo effect refers to an improvement in symptoms as a result of medical treatment with an inactive substance or staged medical procedure. Placebos are given to study the subjects in the control Trial. The study subjects don't know if they are taking real medicaton or not, so researchers can get the effectiveness of trial drug.

  • Patient recovers without genuine medical intervention
  • Attributed to belief in the effectivenees of treatment.
  • Belief mediates healing of symptoms.
  • Cases reported since the early 20th century.

A researcher would like to determine the effect of caffeine on memory. Participants are randomly assigned to receive a caffeine pill or a sugar pill. Both groups complete a recall task that assesses their memory. However, even those who received the sugar pill had a small increase in memory. This is likely due to <u>the placebo effect.</u>

zhuklara [117]3 years ago
5 0

Answer:

The placebo effect

Explanation:

The placebo effect in psychology refers to a situation in which participants in a research receive beneficial effects due to the administration of an inactive substance or a sham treatment. The positive beneficial effect received can then be attributed purely to believe and not to the treatment itself. A placebo treatment could produce a real healing effect like a true medical or psychological treatment.

The participants who received the sugar believed it to be a memory enhancing treatment hence the slight increase in memory capacity due to placebo effect.

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The new species will evolve to survive in the deforested land & animals will migrate to other regions in search of food.

Explanation:

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3 years ago
The table below summarizes Mendel’s results for the F2 generation. Mendel’s Results Plant height 787 tall 277 short Flower color
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Answer:

2001

Explanation:

This question showcases a table that displays Mendel's results (figures) when he crossed pea plants and observed different characters in the plant. Mendel worked with different phenotypic characteristics in the pea plant.

According to the table, the result were for seven characteristics including height, flower color, flower position, pod color, pod shape, seed color, seed shape. Based on the observation of the number of F2 offsprings that possessed dominant trait and recessive trait for each character, we will notice that it follows an approximate phenotypic ratio of 3:1

1. Plant height 787 tall 277 short (3:1)

2. Flower color 705 purple 224 white (3:1)

3. Flower position 651 middle of stem 207 end of stem (3:1)

4. Pod color 428 green 152 yellow (3:1)

5. Pod shape 882 inflated 299 constricted (3:1)

6. Seed color 6,022 yellow X green

7. Seed shape 5,474 smooth 1,850 wrinkled (3:1)

This 3 dominant : 1 recessive ratio is the ratio got in the F2 offsprings when he observed the seven characteristics in pea plants. Hence, the seed color will also follow the same 3:1 ratio

Therefore, 2001 is the result Mendel obtained in the F2 offsprings for the recessive trait of seed color characteristics in his experiment, which actually depicts the 3:1 ratio. Hence, X (green seed color) is 2001

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A food which has been grown without the use of some but not all synthetic pesticides, synthetic fertilizers, or bio engineering could be labeled--- True

What are organic foods ?

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When a food is labeled as organic this means that no pesticides have been used in its production?

Produce can be called organic if it's certified to have grown on soil that had no prohibited substances applied for three years prior to harvest. Prohibited substances include most synthetic fertilizers and pesticides.

Are organic food safer?

According to USDA data, organic foods have fewer pesticide residues than conventionally grown produce. But the amounts for both types of produce are within the level for safe consumption.

What is the meaning of organic farming?

organic farming, agricultural system that uses ecologically based pest controls and biological fertilizers derived largely from animal and plant wastes and nitrogen-fixing cover crops.

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